I got a pair of systemwide upgrades last year as a customer service gesture for a absolutely nightmarish trip to Bangkok--
I could go into great detail on what happened to me to get these but it would upset me too much and remind me of why I really hate United.

Anyway, to make a long story short, these systemwides appear to expire in April-- they're actually the standard travel voucher with "Upgrade" typed on them and a date of 4/30/02-- doesn't actually say it "expires" but i'm guessing that this is what it means.

I should have used them on a trip I took to Beijing/Shanghai I took last August but decided to be smart (dumb) and save them for a scheduled trip to Delhi in October, (since that was a 40K upgrade as opposed to 25K for the China trip). Of course, post 9/11 UA cancelled their service into Delhi (which is a whole another story in and of itself...) and consequently I still have the upgrades.

I'm not sure I'll go somewhere overseas before April, so any thoughts on what I can do with them?

Should I:
a) beg United to extend them? will they even do this?
b) try and get United to retroactively use them for my China trip, since I could have used them there and recredit me the 50K miles from those upgrades? ok, so that's a crazy idea.
c) take a weekend trip to Singapore just to hang out in United Business.
d) take my chances on trying to use them after 4/30/02.
e) "give" them to someone else (out of the kindness of my heart of course).